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Code Issues 1 Projects Releases Wiki Activity

oggdemux: Implement correct parsing of Skeleton 4.0 index packets

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This commit is contained in:
Sebastian Dröge 2010-06-08 13:11:05 +02:00
parent cba98e05cf
commit 3f3691085a
1 changed files with 42 additions and 20 deletions
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62
ext/ogg/gstoggstream.c
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@ -1000,7 +1000,7 @@ static gboolean
read_vlc (const guint8 ** data, guint * size, guint64 * result)
{
gint shift = 0;
gint64 byte;
guint8 byte;
*result = 0;
@ -1032,7 +1032,8 @@ gst_ogg_map_add_index (GstOggStream * pad, GstOggStream * skel_pad,
return TRUE;
}
if (size < 26) {
if ((skel_pad->skeleton_major == 3 && size < 26) ||
(skel_pad->skeleton_major == 4 && size < 62)) {
GST_WARNING ("small index packet of size %u, ignoring", size);
return FALSE;
}
@ -1043,30 +1044,51 @@ gst_ogg_map_add_index (GstOggStream * pad, GstOggStream * skel_pad,
n_keypoints = GST_READ_UINT64_LE (data);
pad->kp_denom = GST_READ_UINT64_LE (data + 8);
if (pad->kp_denom == 0)
pad->kp_denom = 1;
data += 8;
size -= 8;
data += 16;
size -= 16;
if (skel_pad->skeleton_major == 3) {
pad->kp_denom = GST_READ_UINT64_LE (data);
if (pad->kp_denom == 0)
pad->kp_denom = 1;
if (skel_pad->skeleton_major == 4) {
guint64 firstsampletime_n, lastsampletime_n;
guint64 firstsampletime, lastsampletime;
data += 8;
size -= 8;
} else if (skel_pad->skeleton_major == 4) {
gint64 firstsampletime_n, firstsampletime_d;
gint64 lastsampletime_n, lastsampletime_d;
gint64 firstsampletime, lastsampletime;
firstsampletime_n = GST_READ_UINT64_LE (data);
lastsampletime_n = GST_READ_UINT64_LE (data + 8);
firstsampletime_n = GST_READ_UINT64_LE (data + 0);
firstsampletime_d = GST_READ_UINT64_LE (data + 8);
lastsampletime_n = GST_READ_UINT64_LE (data + 16);
lastsampletime_d = GST_READ_UINT64_LE (data + 24);
/* FIXME: What's in this gap? Also http://github.com/cpearce/OggIndex
* and http://wiki.xiph.org/Ogg_Skeleton_4 disagree on the content
* and format of the index pages. This implements the former because
* files using this actually exist... */
pad->kp_denom = GST_READ_UINT64_LE (data + 36);
if (pad->kp_denom == 0)
pad->kp_denom = 1;
GST_INFO ("firstsampletime %" G_GUINT64_FORMAT "/%" G_GUINT64_FORMAT,
firstsampletime_n, pad->kp_denom);
firstsampletime_n, firstsampletime_d);
GST_INFO ("lastsampletime %" G_GUINT64_FORMAT "/%" G_GUINT64_FORMAT,
lastsampletime_n, pad->kp_denom);
lastsampletime_n, lastsampletime_d);
firstsampletime = gst_util_uint64_scale (GST_SECOND,
firstsampletime_n, pad->kp_denom);
if (firstsampletime_d > 0)
firstsampletime = gst_util_uint64_scale (GST_SECOND,
firstsampletime_n, firstsampletime_d);
else
firstsampletime = 0;
lastsampletime = gst_util_uint64_scale (GST_SECOND,
lastsampletime_n, pad->kp_denom);
if (lastsampletime_d > 0)
lastsampletime = gst_util_uint64_scale (GST_SECOND,
lastsampletime_n, lastsampletime_d);
else
lastsampletime = 0;
if (lastsampletime > firstsampletime)
pad->total_time = lastsampletime - firstsampletime;
@ -1076,8 +1098,8 @@ gst_ogg_map_add_index (GstOggStream * pad, GstOggStream * skel_pad,
GST_INFO ("skeleton index parsed total: %" GST_TIME_FORMAT,
GST_TIME_ARGS (pad->total_time));
data += 16;
size -= 16;
data += 44;
size -= 44;
}
GST_INFO ("skeleton index has %" G_GUINT64_FORMAT " keypoints, denom: %"